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#!/bin/bash
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
m4_include(lib/common.sh)
FORCE='n'
RUN=''
NOCOPY='n'
USE_DEVTMPFS='n'
working_dir=''
APPNAME=$(basename "${0}")
# usage: usage <exitvalue>
usage() {
echo "usage ${APPNAME} [options] working-dir [package-list | app]"
echo ' options:'
echo ' -r <app> Run "app" within the context of the chroot'
echo ' -u Update the chroot via pacman'
echo ' -f Force overwrite of files in the working-dir'
echo ' -C <file> Location of a pacman config file'
echo ' -M <file> Location of a makepkg config file'
echo ' -n Do not copy config files into the chroot'
echo ' -c <dir> Set pacman cache. Default: /var/cache/pacman/pkg'
echo ' -h This message'
exit 1
}
while getopts 'r:ufnhC:M:c:d' arg; do
case "${arg}" in
r) RUN="$OPTARG" ;;
u) RUN='/bin/sh -c "pacman -Syu --noconfirm && (pacman -Qqu >/dev/null && pacman -Su --noconfirm || exit 0)"' ;;
f) FORCE='y' ;;
C) pac_conf="$OPTARG" ;;
M) makepkg_conf="$OPTARG" ;;
n) NOCOPY='y' ;;
c) cache_dir="$OPTARG" ;;
d) USE_DEVTMPFS="y" ;;
h|?) usage 0 ;;
*) error "invalid argument '${arg}'"; usage ;;
esac
done
if (( $EUID != 0 )); then
die 'This script must be run as root.'
fi
shift $(($OPTIND - 1))
if [[ -z $RUN ]] && (( $# < 2 )); then
die 'You must specify a directory and one or more packages.'
elif (( $# < 1 )); then
die 'You must specify a directory.'
fi
working_dir="$(readlink -f ${1})"
shift 1
[[ -z $working_dir ]] && die 'Please specify a working directory.'
if [[ -z $cache_dir ]]; then
cache_conf=${working_dir}/etc/pacman.conf
[[ ! -f $cache_conf ]] && cache_conf=${pac_conf:-/etc/pacman.conf}
cache_dir=$( (grep -m 1 '^CacheDir' $cache_conf || echo 'CacheDir = /var/cache/pacman/pkg') | sed 's/CacheDir\s*=\s*//')
unset cache_conf
fi
if [[ -f /etc/pacman.d/mirrorlist ]]; then
host_mirror=$(pacman -Sddp extra/devtools 2>/dev/null | sed -E 's#(.*/)extra/os/.*#\1$repo/os/$arch#')
fi
if [[ -z $host_mirror ]]; then
host_mirror='http://mirrors.kernel.org/archlinux/$repo/os/$arch'
fi
if echo "${host_mirror}" | grep -q 'file://'; then
host_mirror_path=$(echo "${host_mirror}" | sed -E 's#file://(/.*)/\$repo/os/\$arch#\1#g')
fi
# {{{ functions
chroot_mount() {
[[ -e "${working_dir}/sys" ]] || mkdir "${working_dir}/sys"
mount -o bind /sys "${working_dir}/sys"
mount -o remount,ro,bind "${working_dir}/sys"
[[ -e "${working_dir}/proc" ]] || mkdir "${working_dir}/proc"
mount -t proc proc -o nosuid,noexec,nodev "${working_dir}/proc"
mount -o bind /proc/sys "${working_dir}/proc/sys"
mount -o remount,ro,bind "${working_dir}/proc/sys"
[[ -e "${working_dir}/dev" ]] || mkdir "${working_dir}/dev"
mount -t tmpfs dev "${working_dir}/dev" -o mode=0755,size=10M,nosuid,strictatime
mknod -m 666 "${working_dir}/dev/null" c 1 3
mknod -m 666 "${working_dir}/dev/zero" c 1 5
mknod -m 600 "${working_dir}/dev/console" c 5 1
mknod -m 644 "${working_dir}/dev/random" c 1 8
mknod -m 644 "${working_dir}/dev/urandom" c 1 9
mknod -m 666 "${working_dir}/dev/tty" c 5 0
mknod -m 666 "${working_dir}/dev/ptmx" c 5 2
mknod -m 666 "${working_dir}/dev/tty0" c 4 0
mknod -m 666 "${working_dir}/dev/full" c 1 7
mknod -m 666 "${working_dir}/dev/rtc0" c 254 0
ln -s /proc/kcore "${working_dir}/dev/core"
ln -s /proc/self/fd "${working_dir}/dev/fd"
ln -s /proc/self/fd/0 "${working_dir}/dev/stdin"
ln -s /proc/self/fd/1 "${working_dir}/dev/stdout"
ln -s /proc/self/fd/2 "${working_dir}/dev/stderr"
[[ -e "${working_dir}/dev/shm" ]] || mkdir "${working_dir}/dev/shm"
mount -t tmpfs shm "${working_dir}/dev/shm" -o nodev,nosuid,size=128M
[[ -e "${working_dir}/dev/pts" ]] || mkdir "${working_dir}/dev/pts"
mount -o bind /dev/pts "${working_dir}/dev/pts"
[[ -e "${working_dir}/run" ]] || mkdir "${working_dir}/run"
mount -t tmpfs tmpfs "${working_dir}/run" -o nodev,nosuid,strictatime,size=64M
[[ -e $cache_dir ]] || mkdir -p "${cache_dir}"
[[ -e "${working_dir}/${cache_dir}" ]] || mkdir -p "${working_dir}/${cache_dir}"
mount -o bind "${cache_dir}" "${working_dir}/${cache_dir}"
if [[ -n $host_mirror_path ]]; then
[[ -e "${working_dir}/${host_mirror_path}" ]] || mkdir -p "${working_dir}/${host_mirror_path}"
mount -o bind "${host_mirror_path}" "${working_dir}/${host_mirror_path}"
mount -o remount,ro,bind "${host_mirror_path}" "${working_dir}/${host_mirror_path}"
fi
trap 'chroot_umount' EXIT INT QUIT TERM HUP
}
copy_hostconf () {
cp /etc/resolv.conf "${working_dir}/etc/resolv.conf"
cp -a /etc/pacman.d/gnupg "${working_dir}/etc/pacman.d"
echo "Server = ${host_mirror}" > ${working_dir}/etc/pacman.d/mirrorlist
if [[ -n $pac_conf && $NOCOPY = 'n' ]]; then
cp ${pac_conf} ${working_dir}/etc/pacman.conf
fi
if [[ -n $makepkg_conf && $NOCOPY = 'n' ]]; then
cp ${makepkg_conf} ${working_dir}/etc/makepkg.conf
fi
}
chroot_umount () {
umount "${working_dir}/proc/sys"
umount "${working_dir}/proc"
umount "${working_dir}/sys"
umount "${working_dir}/dev/pts"
umount "${working_dir}/dev/shm"
umount "${working_dir}/dev"
umount "${working_dir}/run"
umount "${working_dir}/${cache_dir}"
[[ -n $host_mirror_path ]] && umount "${working_dir}/${host_mirror_path}"
}
chroot_lock () {
# Only reopen the FD if it wasn't handed to us
if [[ $(readlink -f /dev/fd/9) != "${working_dir}.lock" ]]; then
exec 9>"${working_dir}.lock"
fi
# Lock the chroot. Take note of the FD number.
if ! flock -n 9; then
stat_busy "Locking chroot"
flock 9
stat_done
fi
}
# }}}
umask 0022
if [[ -n $RUN ]]; then
# run chroot {{{
#Sanity check
if [[ ! -f "${working_dir}/.arch-chroot" ]]; then
die "'${working_dir}' does not appear to be a Arch chroot."
fi
chroot_lock
chroot_mount
copy_hostconf
eval unshare -mui -- chroot "${working_dir}" ${RUN}
# }}}
else
# {{{ build chroot
if [[ -e $working_dir && $FORCE = 'n' ]]; then
die "Working directory '${working_dir}' already exists - try using -f"
fi
if { type -P btrfs && btrfs subvolume create "${working_dir}"; } &>/dev/null; then
chmod 0755 "${working_dir}"
fi
mkdir -p "${working_dir}/var/lib/pacman/sync"
mkdir -p "${working_dir}/etc/"
chroot_lock
chroot_mount
pacargs="--noconfirm --root=${working_dir} --cachedir=${cache_dir}"
if [[ -n $pac_conf ]]; then
pacargs="$pacargs --config=${pac_conf}"
fi
if (( $# != 0 )); then
op='-Sy'
if [[ $FORCE = 'y' ]]; then
op="${op}f"
fi
if ! pacman ${op} ${pacargs} $@; then
die 'Failed to install all packages'
fi
fi
if [[ -d "${working_dir}/lib/modules" ]]; then
ldconfig -r "${working_dir}"
fi
if [[ -e "${working_dir}/etc/locale.gen" ]]; then
sed -i 's@^#\(en_US\|de_DE\)\(\.UTF-8\)@\1\2@' "${working_dir}/etc/locale.gen"
chroot "${working_dir}" /usr/sbin/locale-gen
fi
echo 'UTC' > "${working_dir}/etc/timezone"
ln -s /usr/share/zoneinfo/UTC "${working_dir}/etc/localtime"
echo 'LANG=C' > "${working_dir}/etc/locale.conf"
copy_hostconf
if [[ ! -e "${working_dir}/.arch-chroot" ]]; then
date +%s > "${working_dir}/.arch-chroot"
fi
# }}}
fi
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